Fig. 5: In situ spectroelectrochemical investigation of Cu1Co1 catalyst.

(a) In situ Raman spectra of Cu1Co1 catalyst at −1.2 V vs. RHE. In situ SR-FTIR spectra of Cu1Co1 catalyst in the range of 900–2200 cm−1 (b) and 2800–3400 cm−1 (c). In situ XANES spectra (d), k3-weighted EXAFS spectra (e), and FT-EXAFS spectra (f) of Cu1Co1 catalyst at Cu K-edge. In situ XANES spectra (g), k3-weighted EXAFS spectra (h), and FT-EXAFS spectra (i) of Cu1Co1 catalyst at Co K-edge. All experiments were conducted in a CO2-saturated 0.2 M KHCO3 and 0.02 M KNO2 solution.